Does not sound like that doctor is a good fit for you!!
I understand your concerns about your heart. I suffer from Interstitial Cysitis, which has MANY co-morbidities, including heart issues. When my holistic doctor treats IC, which is, essentiallly healing the gut, she sees the heart issues improve dramatically. My heart issues are a fluttery/racing feeling in my heart, as though it is skipping a beat. It has gotten a lot better as I heal my gut. I have come to see how much gut health influences ALL heatlh.
I was not suggesting that you go off your supplements long term. Only that if you are not getting results after strict adherence to the diet for several weeks or more, that it would be something to consider removing them on a short term basis.